Abstract Detail


Carruthers, Tom [1], Zuntini, Alexandre R. [1], Antonelli, Alexandre [1], Bellot, Sidonie [1], Crayn, Darren [2], Eiserhardt, Wolf L [3], Forest, Felix [1], Grace, Olwen [1], Smith, Stephen [4], Baker, William [1].

A comprehensive phylogenomic tree of life sheds new light on angiosperm diversification.

A comprehensive phylogeny for angiosperms is essential for unravelling the systematic relationships that underpin this megadiverse clade, as well as the timing, rate, and causes of its explosive evolutionary diversification. Here, we present an angiosperm phylogeny that includes ~60% of all accepted genera inferred from 353 nuclear genes targeted by the Angiosperms353 probe set, representing a 10-fold increase in taxon sampling compared to previous nuclear phylogenomic datasets for angiosperms. This unprecedented dataset was assembled by the Plant and Fungal Trees of Life project (https://www.paftol.org) and its network of over 300 collaborators from 117 institutions in 21 countries. Our phylogenetic analyses utilised a bespoke pipeline that accounted for the complex evolutionary processes that characterise datasets of this scale, enabling the estimation of a robust phylogeny. We combined this phylogeny with over 180 verified fossils to estimate a comprehensive temporal framework for angiosperm diversification. This temporal framework incorporates all phylogenetic branching events that occurred between the origin of angiosperms and ~25Ma. We observe an early “pulse” of diversification that led to the origin of the major components of extant angiosperm diversity. Subsequently, the overall rate of angiosperm diversification continues at a reduced rate, but is characterised by lineage specific trajectories underpinned by around 200 diversification rate shifts. Despite the prevalence of lineage specific diversification trajectories that likely have myriad complex causes, major environmental trends are correlated with distinctive patterns of diversification that can be observed across multiple lineages.  

1 - Royal Botanic Gardens Kew, Richmond, London, TW9 3AE, United Kingdom
2 - James Cook University, Australian Tropical Herbarium, Sir Robert Norman (E2) Building, PO Box 6811, Cairns, QLD, 4870, Australia
3 - Aarhus University, Department of Biology, 8000 Aarhus C, Denmark
4 - 1105 N University Ave, Ann Arbor, MI, 48109, United States


Presentation Type: Oral Paper
Number: PHYLO I014
Abstract ID:237
Candidate for Awards:None

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